402213 divided by 52 
The aim is to understand the frequency of 52 in 402213.

On to step 1:
If we divide 4 by 52, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 52

Moving on to step 2:
52 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Grab the next digit (2) from the dividend, add it to 40, then carry on: 402 / 52

Moving on to step 3:
52 goes into 402 7 times with a remainder of 38.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 364 from 402 and we're left with 38.
Grab the next digit (2) from the dividend, add it to 38, then carry on: 382 / 52

Advancing to step 4:
When dividing 382 by 52, we get 7 with a remainder of 18.
The next digit of our result is 7. 
Result so far: 77.0
Subtract 364 from 382 to get 18.
Bring next digit (1) of the dividend behind the 18 and repeat the process: 181 / 52

Step 5:
52 goes into 181 3 times with a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 773.0
Deduct 156 from 181 and we're left with 25.
Append the next digit (3) from the dividend to 25 and continue with: 253 / 52

Step 6:
When dividing 253 by 52, we get 4 with a remainder of 45.
Use 4 as the next digit of our solution. 
Result so far: 7734.0
The remainder is 45 after subtracting 208 from 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 7:
When dividing 450 by 52, we get 8 with a remainder of 34.
Write down 8 as next digit of the result. 
Result so far: 7734.8
Subtracting 416 from 450 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 8:
If we divide 340 by 52, we get 6 and a remainder of 28.
The next digit of our result is 6. 
Result so far: 7734.86
If we subtract 312 from 340, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 9:
The number 52 fits into 280 5 times, leaving a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 7734.865
If we take 260 away from 280, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
52 can be fit into 200 3 times, resulting in a remainder of 44.
Use 3 as the next digit of our solution. 
Result so far: 7734.8653
Subtracting 156 from 200 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 11:
The number 52 fits into 440 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 7734.86538
Subtracting 416 from 440 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 12:
52 goes into 240 4 times with a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 7734.865384
The remainder is 32 after subtracting 208 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 13:
If we divide 320 by 52, we get 6 and a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 7734.8653846
If we subtract 312 from 320, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 14:
52 goes into 80 1 times with a remainder of 28.
The next digit of our result is 1. 
Result so far: 7734.86538461
The remainder is 28 after subtracting 52 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final outcome is 7734.86538461, with a leftover of 2.8e-08.